Reliability Evaluation Method for Oil-Paper Insulation in Power Transformers

被引：33
作者：
Wang, Youyuan [1 ,2 ]
Gong, Senlian [1 ]
Grzybowski, Stanislaw [2 ]
机构：
[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
[2] Mississippi State Univ, High Voltage Lab, Dept Elect & Comp Engn, Mississippi State, MS 39762 USA
来源：
ENERGIES | 2011年 / 4卷 / 09期
关键词：
power transformers; oil-paper insulation; evaluation method; reliability test; Weibull distribution model; CELLULOSIC INSULATION; SERVICE TEMPERATURES; FURANIC COMPOUNDS; PART; DEGRADATION; POLYMERIZATION;
D O I：
10.3390/en4091362
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The overall life of oil-immersed power transformers depends on the long-term life of the oil-paper insulation system throughout continuous operation. Studying the reliability assessment methods for oil-paper insulation can help determine the reliability level of power transformers accurately, and ensure their safe and stable operation. In the present paper, the life of oil-paper insulation is proven to obey the Weibull distribution under eight different temperatures set by the Weibull reliability probability paper; the failure mechanisms of the different temperatures are highly consistent. The Weibull distribution reliability curve cluster of oil-paper insulation is plotted under different temperatures by which an oil-paper insulation reliability assessment method is proposed. Lastly, the statistical validation experiment of the proposed method is conducted, which proves its theoretical validity. Thus, the present study puts forward a simple and effective method for the oil-paper insulation reliability assessment of power transformers under different temperatures at different life stages.
引用
收藏
页码：1362 / 1375
页数：14
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